What Are Trivex Eyeglass Lenses?
In 2001, PPG Industries created a new purpose for a breakthrough plastic technology called Trivex. This urethane-based pre-polymer substance has three primary benefits for eyeglass lenses:
- Exceptional visual clarity
- High-performance strength
- Ultra-lightweight comfort
Using Trivex as glasses material has grown in popularity in the U.S. Lenses made from Trivex material fulfill the same safety standards as those made from polycarbonate.
However, because of Trivex’s manufacturing process, plastic lenses with Trivex material do not distort vision as much.
Trivex Lens Material vs. Polycarbonate Lenses
Polycarbonate and Trivex are common lens types used for children’s eye wear, safety glasses, and sports eye wear. Opticians recommend these plastics because of their UV protection and high-impact resistance.
Both polycarbonate and Trivex are lightweight. This works well with rimless frames or drill mount eye wear.
But some differences can make Trivex a preferable option.
Prescription glasses with lenses made from Trivex have a high Abbe value of 43 to 45. Polycarbonate, however, has an Abbe value of 30.
Higher Abbe value
The Abbe value is important because it measures chromatic aberration (light dispersed through a lens into its color elements). Depending on the degree of chromatic aberration, images viewed through eye wear may appear more or less distorted.
The higher the Abbe value, the lower the chromatic aberration and the higher the likelihood of visual clarity. Trivex, when compared to polycarbonate, works better.
Trivex is also much more resistant to chemicals than polycarbonate.
Trivex has been shown to be resistant to household products like bleach, salt water, window glass cleaner, suntan lotion, and nail polish remover.
Lighter and less dense
Lastly, Trivex has a lower specific gravity (1.11) to that of polycarbonate (1.66).
Specific gravity describes the ratio of density of any given material to that of a reference substance. In effect, a lower value means it is less dense (i.e. more lightweight).
Trivex is one of the lightest materials used for lenses.
Advantages of Trivex Lenses
Due to their composition and design, Trivex lenses offer many benefits, including:
High impact resistance
This promises safety and minimizes the risk of injury for people with active lifestyles.
Trivex has a lower density ratio than other standard plastics. It is one of the lighter materials used for lenses.
For older people, lightweight material is extremely important. When the skin on the bridge of the nose becomes finer and more sensitive, lightweight eye wear can decrease the likelihood of irritation.
With aspheric and atoric lens designs (flatter lens curves), Trivex enhances comfort because it has a slimmer profile.
Those who want to avoid scratches on their eyewear can ask for an anti-scratch coating on this plastic material.
Trivex has a high Abbe value that offers clean, sharp vision. This can be more important for those with strong prescriptions but who don’t want to sacrifice visual clarity.
Wider, more natural vision
Aspheric and atoric lens designs reduce unwanted magnification and minification (objects appear smaller) found in more traditional eye wear. These types of designs also increase the peripheral view by eliminating distortion.
Lenses made from Trivex provide 100% UV protection from both UV-A and UV-B radiation.
No internal stress
Unlike most polycarbonate lenses, Trivex lenses are internally stress-free. This means such lenses have a lower chance of breaking under pressure, like from thick frames.
Lenses and mounting components flex over time when you wear a rimless mounting. This can lead to loose lenses and the need for replacements. However, because Trivex material is durable and strong, the shape does not change.
Trivex is resistant to many chemicals, including acetone. It performs better in chemical resistance than some of its other competitors.
Finally, Trivex can undergo many surface treatments, including anti-reflective, hard coatings, and tinting. This aspect makes Trivex an excellent option for sunglasses, too.
Photochromic lenses are also available in Trivex.
Disadvantages of Trivex Lenses
Although Trivex lenses provide an almost endless list of advantages, there are some downsides:
Polycarbonate is more common in different lens designs than Trivex.
Not enough thinness
Lenses made from Trivex cannot offer the same degree of thinness as high-index lenses. The thinness found in high-index lenses reduces the “coke bottle” appearance and is ideal for those needing high visual correction.
Trivex outperforms many other lens material alternatives. However, it can come at a cost. Between coatings and type of eye wear, Trivex lenses can be expensive.
How Much Do Trivex Lenses Cost?
More than a decade has passed since Trivex origination. This means that the product is more common and costs have slightly decreased.
Yet, because Trivex lenses have many strong attributes, costs can range between $200 to $400. Factors that may influence the final price are:
Single-vision or progressive lenses
Progressive lenses can increase the price because they offer a more gradual modification in lens strength for clearer vision at any distance.
Anti-scratch or anti-reflective coatings can raise costs, too. Fortunately, because Trivex has inherent UV protection, there is no need to pay for a UV coating.
Different mounting frames
Rimless frames tend to be more expensive than full-frame glasses.
If you’re considering purchasing new eye wear and are interested in Trivex, speak to an eye care specialist for additional information.
Trivex lenses are a great alternative to polycarbonate lenses. They don't distort vision as much, and they provide excellent, comfortable vision. Just like other vision correction options, it's best to consult with your doctor to ensure it's right for you.
Frequently Asked Questions
What is Trivex?
Trivex is a urethane-based pre-polymer substance developed by PPG Industries for use in eyeglasses. It was designed to provide exceptional optical clarity, high-performance strength, and ultra-lightweight comfort.
Do I need Trivex lenses?
There are no refractive errors that make you need Trivex lenses. However, they are a great option for people who need safety lenses or who live active lifestyles. This is because they offer 100 percent protection from UV rays, sharper central vision, and sharper peripheral vision.
Do Trivex lenses scratch easily?
No, Trivex lenses are scratch-resistant. They can also be coated in additional anti-scratch coating for increased protection.
Are Trivex lenses better than polycarbonate?
Trivex lenses are slightly lighter, have a higher tensile strength, and may produce sharper central vision and peripheral vision due to their higher Abbe value and lower internal stress. However, Trivex is slightly thicker, less widely available, and usually costs more than polycarbonate.
Is Trivex more expensive than polycarbonate?
Polycarbonate lenses have been around longer and are more widely available. Trivex lenses often cost more than polycarbonate, though the prices vary widely for both.
Is Trivex better than high index?
High index plastic is thinner and more lightweight, and usually have more options in terms of lens colors and sizes. Trivex is slightly more optically clear and impact resistant than high index.
Are Trivex lenses worth it?
Trivex lenses are an excellent choice if safety is an issue or you lead an active lifestyle.
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